发明名称 |
METHOD FOR REDUCING STICK-SLIP DURING WELLBORE DRILLING |
摘要 |
A method for drilling a wellbore includes operating at least one motor coupled within a drill string to turn a drill bit at an end thereof. An automatic drill string rotation controller causes rotation of the drill string in a first direction until a measured parameter related to torque on the drill string reaches a first selected value. The automatic drill string rotation controller causes rotation of the drill string in a second direction until the measured parameter related to torque is reduced to a second selected value. The drill string is axially advanced to cause the drill bit to extend the wellbore. |
申请公布号 |
EP2870320(A1) |
申请公布日期 |
2015.05.13 |
申请号 |
EP20130812637 |
申请日期 |
2013.06.28 |
申请人 |
SERVICES PÉTROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V. |
发明人 |
NORMORE, ANDREW DEREK;MAIDLA, ERIC E. |
分类号 |
E21B47/007;E21B44/00;E21B47/01 |
主分类号 |
E21B47/007 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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